Improvement in machines for damping paper for printing



z Sheets5heet 1 E. WALKER.

MACHINES FOR DAMPING PAPER FOR PRINTING.

N0.184,0Z5. Patented Nov. 7,1876.

ZSheets-Sheet 2. 4 E. WALKER. MACHINES FOR DAMPING PAPER FOR PRINTING.

Patented Nov. 7, 1876.

5W 114mmer d, whose journals are fitted to UNITED STATES PATENT OFFICE.

EDMUND WALKER, OF LONDON, ENGLAND.

IMPROVEMENT IN MACHINES FOR DAMPING PAPER FOR PRINTING.

Specification forming part of Letters Patent No. 184,025, dated November7, 1876; application filed February 5, 1875.

To all whomit may concern;

Be it known that I, EDMUND WALKER, of London,England, engineer, haveinvented an Improved Method of and Machinery for Damping Paper forPrinting Purposes, of which the following is a specification:

This invention consists in the combination of a reciprocating bar with apipe carrying jets and certain connectingarms, as will be fullydescribed hereinafter.

Figure l is a plan or top view of the said machine. Fig. 2 is a sideelevation of the same, with a portion removed to show more clearly theessential parts of my invention.

Like letters indicate the same parts in both of the figures.

The said machine has a frame, a, of castiron or other suitable material,and which has at one end suitable bearings a for the first reel orroller 1). To the shaft b I apply a brake ofany suitable construction.The brake shown in the drawing consists of a shoe, 0, of wood or othermaterial, which bears on the wheel or roller b and is secured to aweighted lever, c. The pressure of this brake is regulated by adjustingthe weight 0 on the said lever. The said machine also carries near itsother end the second or receiving reel or rollturn freely in bearings aIn front of this roller d I arrange apipe or tube, e, provided withnozzles f or jet pipes or apertures, and connected, by a flexible pipe,9, with a'cistern or pump for so pplyingit with water, or with asteam-boiler for supplying it with steam or vapor. The water or steamissuing from the said nozzles or jets will damp or wet the paper as itis coiled on the roller. The pipe 0 may be fixed immovably to the frame;but I prefer that it should be movable, and it is therefore attached, bythe arms or bars a, to a rod or bar, 0 which is fitted to slide endwisein bearings a in the sides of the frame a, and is moved to and frotherein by the lever h, which has its fulcrum at 71), and is actuated bya cam, 'i, on the shaftj, which is geared, in connection with the roller-journals, by toothed wheels, as shown in Fig.1. By moving the pipe 6 toand fro while the water or vapor is being discharged from its nozzles orany required number of them upon the paper, the entire surface of thepaper will be uniformly damped or-wetted. The said nozzles have cocks f,by which the discharge of any of them stopped, and a greater or lessernumber of them may be opened, as may be found necessary or desirable.The pipe 0 may also be adjusted upon the arms (2', nearerto or fartherfrom the roller 01, for the purpose of adjusting it to the exactdistance required from the roller, and is made fast on the said arms bysetscrews 0 As it will sometimes not be necessary that the wetting ordamping should be continuous along the entire length of the paper, Iprovide the supply-pipe to which the flexible pipe 9 is attached with avalve or cock, k, which is opened and closed alternately by a rod, k,actuated by a cam or other device geared in connection with the rollercl. This cam is so formed and operated that the opening of the saidvalve will be stopped intermittently during a number of revolutions ofthe roller, so that the damping or wetting of the paper will beintermittent, and by having a number of these cams, which may be changedas desired, I may adapt the apparatus to damp or wet the paper more orless, according to its class or quality, some classes of paper requiringconsiderably more damping than others. lm are adjustablesmoothing-rollers, which support and guide the paper between the reels bd.

In using the machine represented in the drawing, a reel,-b, with thecontinuous paper coiled upon it, is placed in the bearings a and isconducted over the roller l and under the roller m to the reel 01, itsend being coiled upon the said reel. Then the machine is set in motionby power applied to the drivingpulley, and the reel d turns rapidly inthe proper direction to coil the paper n upon it, as indicated by thearrow. The cocks of the nozzlesf being opened, the water in a state offine spray (or the steam or vapor) is ejected from the said nozzle uponthat portion of the paper which is nearly opposite the part I where itis received upon the said reel, as clearly shown in Fig. 2. Therefore,as will be clearly understood by referring to this figure and by theabove description, there will always be between this part 1, when thepaper is being received and coiled on the reel, and the part iscontrolled or thereof wetted by the spray of water, a large area, inproportion to size of reel, of dry or unwetted paper, which, bindingclosely and tightly upon the preceding coil, will, at any moment duringthe process of reeling, take the Whole or nearly the whole strain causedby the application of the brake, and therefore the damped or Wettedportion will be protected from suchv strain, and consequently thereeling and damping for the entire length of paper may be accomplishedwith great rapidity, and the paper will be uniformly damped or wetted;and as a great pressure may be applied to the brake without tearing thepaper, it will be free from creases or wrinkles and in the mostfavorable condition for the printing. As the reels are emptied andfilled they are removed from the machine, and others put in their place.The said reels may be'supplied with the continuous paper in any requiredlength. For newspaper printing it is preferable to use lengths of fromthree to four miles.

It is obvious that the position of the nozzles f is not necessarily thatshown in the drawing. They may be placed opposite the circumference ofthe reel (1 at any point which will leave between it and the part 1,where the paper is received upon the said reel, a sufficient area of dryor unwetted paper to keep the strain or pressure caused by the brakefrom the damped or wetted portion. But I prefer to have these nozzles inthe position shown, as when so arranged they are easily accessible andin the most convenient position to be controlled by the operator orattendant.

I claim as my invention- The combination of the reciprocating bar e withthe pipe 6, having jets f and connectingarms 0 as described.

EDMUND WALKER.

Witnesses:-

WM. R0131. LAKE, HY. JAS. NooN.

